Heavy duty steel bed frame



FIG. 1 is a perspective view of a heavy duty steel bed frame showing my new design.

FIG. 2 is another perspective view thereof.

FIG. 3 is a front view thereof.

FIG. 4 is a rear view thereof.

FIG. 5 is a left end view thereof.

FIG. 6 is a right end view thereof.

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof. 

CLAIM The ornamental design for a heavy duty steel bed frame, as shown and described. 